Year	% (modeled ILO estimate)
1991	46.047
1992	37.052
1993	30.965
1994	28.478
1995	28.645
1996	26.914
1997	28.245
1998	30.674
1999	32.936
2000	33.391
2001	34.574
2002	34.755
2003	35.003
2004	35.901
2005	40.591
2006	41.621
2007	44.699
2008	45.062
2009	41.494
2010	39.981
2011	41.252
2012	42.681
2013	43.915
2014	42.996
2015	42.837
2016	43.283
2017	43.699
2018	45.533
2019	45.157
2020	41.416
2021	44.018
2022	46.928
2023	47.795